#include "stm32f10x_conf.h"
#include "stm32f10x.h"
#include "ADC.h"
#include "USART.H"
#include "delay.h"
#include "TFTLCD.h"
#include <math.h>

extern u16 VcBuf[];

void ADC_DMA_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	ADC_InitTypeDef ADC_InitStructure;
	DMA_InitTypeDef DMA_InitStructure;
	
	TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;
	TIM_OCInitTypeDef         TIM_OCInitStructure;

	RCC_ADCCLKConfig(RCC_PCLK2_Div8); 
	
	/* Enable peripheral clocks ------------------------------------------------*/
	/* Enable DMA1 clock */
	RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

	/* Enable ADC1 and GPIOC clock */
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE);
	
	/* Configure PA.01 (ADC Channel1) as analog input -------------------------*/
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	
	/* TIM1 configuration ------------------------------------------------------*/ 
	/* Time Base configuration */
	TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); 
	TIM_TimeBaseStructure.TIM_Period = 90;          
	TIM_TimeBaseStructure.TIM_Prescaler = 100;       
	TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;    
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
	TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
	/* TIM1 channel1 configuration in PWM mode */
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; 
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;                
	TIM_OCInitStructure.TIM_Pulse = 0x10; 
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;         
	TIM_OC1Init(TIM1, &TIM_OCInitStructure);
					   
	/* TIM1 counter enable */
	//TIM_Cmd(TIM1, ENABLE); 
	/* TIM1 main Output Enable */
	TIM_CtrlPWMOutputs(TIM1, ENABLE); 

	/* DMA1 channel1 configuration ----------------------------------------------*/
	DMA_DeInit(DMA1_Channel1);
	DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)&(ADC1->DR);
	DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&VcBuf;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
	DMA_InitStructure.DMA_BufferSize = VcBuf_Len;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(DMA1_Channel1, &DMA_InitStructure);

	/* Enable DMA1 channel1 */
	DMA_Cmd(DMA1_Channel1, ENABLE);

	/* ADC1 configuration ------------------------------------------------------*/
	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_InitStructure.ADC_ScanConvMode = DISABLE;
	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStructure.ADC_NbrOfChannel = 1;
	ADC_Init(ADC1, &ADC_InitStructure);

	/* ADC1 regular channel1 configuration */ 
	ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_55Cycles5);

	/* Enable ADC1 DMA */
	ADC_DMACmd(ADC1, ENABLE);

	/* Enable ADC1 */
	ADC_Cmd(ADC1, ENABLE);

	/* Enable ADC1 reset calibaration register */   
	ADC_ResetCalibration(ADC1);
	/* Check the end of ADC1 reset calibration register */
	while(ADC_GetResetCalibrationStatus(ADC1));

	/* Start ADC1 calibaration */
	ADC_StartCalibration(ADC1);
	/* Check the end of ADC1 calibration */
	while(ADC_GetCalibrationStatus(ADC1));

	/* Start ADC1 Software Conversion */ 
	ADC_SoftwareStartConvCmd(ADC1, ENABLE);

}


